What it means
A delusionship is a relationship that lives mostly inside your own head, where you have mentally planned the wedding while the other person barely remembers your name. It is the wide gap between the romance you keep imagining and the polite acquaintance that actually exists.
Usage examples
"They have spoken twice but she is deep in a delusionship with the barista."
"My whole summer romance turned out to be a delusionship, he had a girlfriend."
"Babe, that's not your man, that's a full delusionship with a guy who liked one Story in March."
"I had to snap out of the delusionship real quick when she introduced me to her actual boyfriend."
Where it comes from
This is an internet-built blend of delusion and relationship. It took off in online dating chat, stan spaces, and meme-heavy social feeds as a jokey way to name a one-sided romance you've fully decorated in your head while the actual connection is barely even loading.